EP 0350063 A2 19900110 - Liquid crystal display device.
Title (en)
Liquid crystal display device.
Title (de)
Flüssigkristall-Anzeigevorrichtung.
Title (fr)
Dispositif d'affichage à cristal liquide.
Publication
Application
Priority
- JP 16901488 A 19880708
- JP 16901788 A 19880708
Abstract (en)
The present invention discloses a liquid crystal display device including a liquid crystal cell (5) including two substrates (1, 1 min ) which are arranged substantially parallel to each other and have electrodes (7, 7 min ) on opposing surfaces thereof, and a liquid crystal composition (9) held between the substrates (1, 1 min ) such that the liquid crystal molecules are arranged in a twisted mode, first and second polarizers (3, 4) arranged at both sides of the liquid crystal cell (5), and first and second optical delay plates (10, 11) arranged between the liquid crystal cell (5) and the second polarizer (4), wherein assuming that a retardation value of the liquid crystal cell (5) is given by: R0 = DELTA n.d.cos<2> theta where DELTA n is the optical anisotropy of the liquid crystal composition (9), d is the distance between the two substrates (1, 1 min ) in the liquid crystal cell (5), and theta is the tilt angle of the liquid crystal composition (9), a total of the retardation values of the first and second optical delay plates (10, 11) is R0 x 0.8 to R0 x 1.2. A display obtained by the liquid crystal display device of this invention is a high-contrast, bright, and achromatic b/w display. The liquid crystal display device of this invention has a wide viewing angle and is inexpensive.
IPC 1-7
IPC 8 full level
G02F 1/13363 (2006.01); G02F 1/139 (2006.01)
CPC (source: EP KR US)
G02F 1/133 (2013.01 - KR); G02F 1/13363 (2013.01 - EP US); G02F 1/1397 (2013.01 - EP US); G02F 2202/40 (2013.01 - EP US); G02F 2413/02 (2013.01 - EP US); G02F 2413/07 (2013.01 - EP US); G02F 2413/08 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0350063 A2 19900110; EP 0350063 A3 19900905; KR 900002113 A 19900228; KR 930002916 B1 19930415; US 4995704 A 19910226
DOCDB simple family (application)
EP 89112474 A 19890707; KR 890009739 A 19890707; US 37654189 A 19890707